Compressor



-F. J. HEIDE'YIAN.

COMPRESSOR.

APPLICATION FILED JAN. 19, 19H.

1,401,102 Patented Dec. 20, 1921.

2 SHEETS-SHEET lp H 1111611501: mzi' I Eedricla ljiez rlemamj F. J.HEIDEMAN.

COMPRESSOR.

APPLICAT|0N FILED JAN. 19. 1917.

1,401,102. Patented Dec. 20, 1921.

2 SHEETS-SHEET 2- flu @2280)": Fredric/z JHez'aZeman,

UNITED STATES PATENT OFFICE.

FREDRICK J. HIEIDEMAN, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE .ASSIGN-MENTS, TO THE ISKO COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELA-WARE.

COMPRESSOR.

Specification of Letters Patent. Y

Patented Dec. 20, 1921.

Application filed January 19, 1917.- Serial No. 143,311.

To all whom it may concern:

Be it known that I, Fnnnnrox J. HEIDE- MAN, a citizen of the UnitedStates, and resident of. Detroit, Wayne county, State of Michigan, haveinvented certain new and useful Improvements in Compressors, of whichthe followingis a specification.

This invention relates to compressors or like mechanism, andparticularly to two cylinder compressors in which the pistons areoperated by eccentric and strap connections.

One of the objects of the invention is to provide a compressor ofcompact form and eflicient operation.

Another object of the invention is to provide a novel and simpleconstruction of connectin rod and eccentric mechanism for operating thepiston of a compressor or like machine. .1

Another object of the invention is to provide a novel and. simplecylinder head and valve constrgjction for compressors.-

Oth'er objects of the invention will appear from the followingdescription taken in connection with the drawings, which form a partofthis specification, and in which:

I igure 1 illustrates a compressor built in accordance with thisinvention, the left half of th'e'view being in elevation except for acut away portion of the cylinder and the ri ht half being'in verticalsection;

ig. 2 is a vertical section through one of the cylinders taken at rightangles to the section of Fig. 1; v Fig. 3 is a horizontal sectlon on theline 3-3 of Fig. 2; and

. Fig. 4 is a section through the detachable cylinder head.

The invention is shown in the drawings in the'form; of a two cylindercompressor such as may be used in connection with a refrigeratingapparatus of the compression type. Changes and modifications may be madein this form without departing from the spirit of the invention.

Referrin to the drawings, 10 represents a casting w ich as shown mayconstitute the crankcase 11 and the two cylinders 12 arranged with theiraxes in parallel but offset on opposite sides of the crank shaft 13.This crank shaftis mounted in suitable bearings 14 in the crank case andis provided with packing 15 to prevent leakage. One side of the crankcase may be formed with an opening 11 closed by a removable cover 10' inand a very compact cylinder and crank case casting becomes possible.

The connecting rod construction for each cylinder comprises a rod 17threaded into a one piece strap 18 which surrounds the eccentric, and aball and socket connection to a piston 17 Thus the piston has a socket19 in which a ball member 20 fits being held therein by a ring 21threaded into the piston. The upper end of the rod 17 is rigidlyconnected to the ball 20 as by a pin or rivet .22. T1118 pistonconnection of the connecting rod serves to position the eccentric strapaxially on the eccentric.

The cylinder heads are formed by a head plate 23 which covers the topsof both of. the cylinders and a cover 24 arranged over the head plate.'In the head plate are openings 25 over each cylinder and .in each suchopening is an outlet valve 26, shown as of the poppet type. The valve ispressed against its seat 27 by a pair ofsprings 28 retained by a guidering 29, which ring forms a guide for the valve stem 30 and is itselfretained over the opening 25 by the cover 24. The cover and head plateare detachably secured to the cylinders by bolts' as at 36 at a. pointto be uncovered by the piston at the lower or inner end of its stroke.

When the compressor is used as part of a refrigerating unit, the crankcase ma be provided with a charging opening 3 in" which is a plug 38 anda cap 39, hereby the refrigerant may be received into the system.

. inders comprising outlet conduits therefrom v =='-having an enclosedpassage in the Wall com- 20 Inunicating at one end with the crankcaseHaving thus described my invention, what crank case and cylinders formedin a single casting and having a by-pass conduit leading from the crankcase to ports in the cylinders to be uncovered by the pistons at theinner end of their stroke, an inlet conduit for the crank case, and ahead for the cyland housing the outlet valves.

3. In a compressor, the combination of a crank case and a cylinder, acrank shaft in the crank case, a piston and a connecting rod, 9,conduitleading to the crankcase, an

. uninterrupted conduit leading from the I and an outlet conduit fromthe cylinder. 3

crankcase to a port in the cylinder wall,

frigerant, in combination, a crank' case, a

- cylinder secured thereto, a shaft in the crank case, a piston in thecylinder,mechanism connecting the shaft and iston to reciprocate thelatter, a conduit supplying refrigerant to the crankcase, anuninterrupted conduit connecting the crank case and an inlet port in thecylinder adjacent the suction end of the piston stroke and an outlet forthe cylinder.

5. In a compressor for compressing a re'- frigerant, in combination, acrank case, a cylinder secured thereto, a shaft 1n the crank case, apiston in the cylinder, mechanism connecting the shaft and piston torecipro and a conduit 'supplying're cate the latter, frigerant to thecrank case, saidcylinder andat its other end in communication with thecylinder at a point adjacent the suction end of the piston'stroke,said'cylinder also having an outlet. I I

' In testimony. whereof I affixmg signature.

FREDRIOK HEI EMAN.

